Abs And Brake Lights On At The Same Time

My ABS and brake lights came on today when I was driving off from where I went. I put brake fluid in a few days ago and cannot figure out why both lights would come on. Any help would be appreciated. :banghead:

More than likely you have an ABS problem, this requires a scan with an abs function scanner. Was the fluid low, does the pedal feel normal? BTW, always post the year.

I had the same problem not too long ago with my 02 Yukon. Mine was also making a noise under the drivers seat. Turns out that it was my EBCM (Electronic Brake Control Module) which controls that Anti-Lock Brake system.